Frequencies for first 10,000 rows of rgn_cd variable in pos1999 dataset :

region code |      Freq.     Percent        Cum.
------------+-----------------------------------
         04 |      1,490       14.90       14.90
         06 |      1,576       15.76       30.66
         09 |      6,735       67.35       98.01
         10 |        199        1.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017